/**
 * 
 */
package org.gudy.azureus2.ui.console.commands;

import java.text.FieldPosition;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;

import org.gudy.azureus2.core3.download.DownloadManager;
import org.gudy.azureus2.core3.global.GlobalManager;
import org.gudy.azureus2.core3.global.GlobalManagerAdapter;
import org.gudy.azureus2.core3.logging.ILogEventListener;
import org.gudy.azureus2.core3.logging.LogEvent;
import org.gudy.azureus2.core3.logging.LogRelation;
import org.gudy.azureus2.core3.logging.Logger;
import org.gudy.azureus2.core3.util.AEMonitor;
import org.gudy.azureus2.ui.console.ConsoleInput;

import com.aelitis.azureus.core.AzureusCoreFactory;

/**
 * @author TuxPaper
 * @created Dec 21, 2006
 * 
 */
public class TorrentLog extends TorrentCommand implements ILogEventListener {
    private static int MODE_OFF = 0;
    private static int MODE_ON = 1;
    private static int MODE_FLIP = 2;

    private static SimpleDateFormat dateFormatter;

    private static FieldPosition formatPos;

    private int mode = 0;

    private AEMonitor dms_mon = new AEMonitor("TorrentLog");

    private ArrayList dms = new ArrayList();

    private boolean gm_listener_added;

    static {
        dateFormatter = new SimpleDateFormat("[h:mm:ss.SSS] ");
        formatPos = new FieldPosition(0);
    }

    /**
     * @param commandNames
     * @param action
     */
    public TorrentLog() {
        super("tlog", "tl", "Torrent Logging");
    }

    public void execute(String commandName, ConsoleInput ci, List<String> args) {
        mode = MODE_ON;
        Vector newargs = new Vector(args);
        if (newargs.isEmpty()) {
            mode = MODE_FLIP;
        } else if (newargs.contains("off")) {
            newargs.removeElement("off");
            mode = MODE_OFF;
        } else if (!newargs.contains("on")) {
            mode = MODE_FLIP;
        }
        super.execute(commandName, ci, args);
    }

    protected boolean performCommand(ConsoleInput ci, DownloadManager dm, List args) {
        try {
            dms_mon.enter();

            // defer this so that a non-running core doesn't prevent console ui init

            if (!gm_listener_added) {

                gm_listener_added = true;

                GlobalManager gm = AzureusCoreFactory.getSingleton().getGlobalManager();
                gm.addListener(new GlobalManagerAdapter() {
                    public void downloadManagerRemoved(DownloadManager dm) {
                        dms.remove(dm);
                    }
                }, false);
            }

            boolean turnOn;
            if (mode == MODE_FLIP) {
                turnOn = !dms.contains(dm);
            } else {
                turnOn = mode == MODE_ON;
            }

            if (turnOn) {
                ci.out.print("->on] ");
                if (dms.contains(dm)) {
                    return true;
                }
                dms.add(dm);
                if (dms.size() == 1) {
                    Logger.addListener(this);
                }
            } else {
                ci.out.print("->off] ");
                dms.remove(dm);
                if (dms.size() == 0) {
                    Logger.removeListener(this);
                }
            }
        } catch (Exception e) {
            e.printStackTrace(ci.out);
            return false;
        } finally {
            dms_mon.exit();
        }
        return true;
    }

    public String getCommandDescriptions() {
        return "tl [on|off]\tTorrentLogging";
    }

    public void log(LogEvent event) {
        boolean bMatch = false;

        if (event.relatedTo == null) {
            return;
        }

        try {
            dms_mon.enter();

            for (int i = 0; !bMatch && i < event.relatedTo.length; i++) {
                Object obj = event.relatedTo[i];

                if (obj == null)
                    continue;

                for (int j = 0; !bMatch && j < dms.size(); j++) {
                    if (obj instanceof LogRelation) {
                        // System.err.println(obj.getClass().getSimpleName() + " is Logrelation");

                        Object newObj = ((LogRelation) obj).queryForClass(DownloadManager.class);
                        if (newObj != null)
                            obj = newObj;
                    }

                    // System.err.println(obj.getClass().getName() + " matches " + filter[j].getClass().getSimpleName() + "?");

                    if (obj == dms.get(j))
                        bMatch = true;
                } // for filter
            } // for relatedTo

        } finally {
            dms_mon.exit();
        }

        if (bMatch) {
            final StringBuffer buf = new StringBuffer();
            dateFormatter.format(event.timeStamp, buf, formatPos);
            buf.append("{").append(event.logID).append("} ");

            buf.append(event.text);
            if (event.relatedTo != null) {
                buf.append("; \t| ");
                for (int j = 0; j < event.relatedTo.length; j++) {
                    Object obj = event.relatedTo[j];
                    if (j > 0)
                        buf.append("; ");
                    if (obj instanceof LogRelation) {
                        buf.append(((LogRelation) obj).getRelationText());
                    } else if (obj != null) {
                        buf.append(obj.getClass().getName()).append(": '").append(obj.toString()).append("'");
                    }
                }
            }
            System.out.println(buf.toString());
        }
    }

}
